dict_items views.  The method is required by the collections.Set ABC,
which the views register as supporting.

Patch by Alexander Belopolsky.

A patch from Dave Malcolm.

svn+ssh://svn.python.org/python/branches/py3k

........
  r73715 | benjamin.peterson | 2009-07-01 01:06:06 +0200 (Mi, 01 Jul 2009) | 1 line

  convert old fail* assertions to assert*
........

(PEP 3106 requires subset comparisons too, those will come later if someone
really wants them. :-)

  and .keys(), .items(), .values() return dict views.

The dict views aren't fully functional yet; in particular, they can't
be compared to sets yet.  but they are useful as "iterator wells".

There are still 27 failing unit tests; I expect that many of these
have fairly trivial fixes, but there are so many, I could use help.

(Not for dict_values, where it can't be done faster than
the default implementation which just iterates the elements.)